Dynamo-electric machine.



ALFRED E. WOUTERS, -OF NORWOOD, Ol'llO, 1S-SIGNOR TO ALLIS-CHALMERSCOMPANY, A CORPORATION OF NEW JERSEY, AND THE BULLOOK ELECTRICB/IANUFAOTURNG COM#- PANY, A CORPORATION Ol? OHIO.

DYNAMG-LE LE CTRC MACHINE Specification of Letters Patent.

Patented april ef, ieee.

Application filed January 31, 1907. Serial No. 355,089.

To all whom it 'may concern:

Be it known that 1, Amann H. Wonrnns, belonging to the Kingdom of theNetherlands, residing at Norwood, in the county of Hamilton and State ofOhio, have invented certain new and useful Improvements inDynamo-Electric Machines, of which the following is a full, clear, andexact specification.

My invention relates to rotary members of high speed dynamo-electricmachines, particulary to rotary field members of turboalternators of thecylindrical core type. 'Rotary field members or this type are usuallyprovided with radial slots and with Wedgeshaped field coils arrangedconcentrically about each pole and having end portions which projectbeyond the core. The proj ecting portions vof the coils are inclosedwithin and are supported by end covers or shields each of which consistsof a ring or cylindrical portion which surrounds the coils and with anend portion either integral with the cylindrical portion or separatetherefrom, at right angles to the shaft and cylindrical portion. Eachend cover usually rests upon the core and the shait and is held inposition by a nut on the latter.

One of the objects ot my invention is to provide means whereby the partsof the rotary member, particularly the parts at the ends thereof, suchas the end covers and the ends ofthe coils, are held more firmly inposition and prevented from moving relative to each other duringrotation.

With this end iii view, my invention consists in certain novel detailsof construction and combinations and arrangements of parts which will bedescribed in the specification and pointed out in the appended claims.

For a better understanding of my invention, reference is had to theaccompanying drawings in which* Figure 1 is a partial longitudinalsectional view of a rotary field member of a. turboalternator equippedwith my invention. Fig. 2 is a partial plan view of the same, partebeing broken away for the salie. of clem-ness. Fig. 3 is an end view,partly in elevation and partly in section. Fig. -l is a pai-tiallongitudinal sectional view showing a modified form of niy invention,and Fig. 5 is an end view of the same, parts being removed for the sakeof clearness.

of thecoils bear against tne inner surfaces Referring now to 1Jigs. 1, 2and 3 of the drawings, 10 represents a shaft of the machine on which ismounted the core 11, which as here shown is composed of laminas clampedbetween the end plates, one of which is shown at 12. Ende-plate 12 isheld in position by a nut 13 engaging the threaded portion 14 of theshaft. The core is provided with radial slots in which are locatedwedge-shaped held coils 15 of edgewisewound strapcopper, being held inposition by wedges 16 of non-magnetic material. 6 The end portions ofthe coils, as shown, eX- tend beyond the end of the core, and areinclosed vvithinan end cover. or shield 17 consisting in this instance,of tvvo parts, a ring, band or cylindrical portion 18, and an annulardisl; 19 mounted on, the shaft at right angles Ato the latter and to thering. The ring 18 is supported by the end plate 12 and the disk 19, theinner edge of the ring resting within a groove in the end plate, andtheA outer edge resting within a groove in the end disk 19. At 2O is anut which engages the threaded portion 21 of the shaft to hold the endcover and its parts in lace. The ends of the end ring 18 and are thusprevented from being bent outward by centrifugal force. rl`lie coils ofeach group are separated from one another, from the core and from theendl dish by insulating spacing members 22. Located between the ends oladjacent groups of coils are filling blocks or wedge-shaped menibers 2ewhich extend from the core or end plate 12 to the end disl; 19, and bearagainst the end cover 18. These filling blocks which are preferably madefrom sonic light material such as aluminum, are substantialcontinuations of the core teeth which lie between the oups of coils.This construction is shown most clearly in Figs. 2 aiidB. At 25 areshown axial bolts or studs which extend through the end dish 19 and-wedge-shaped filling blocks 2-1 iiito tapped holes in the end plate 12of the core. ln this instance l have shown eight such bolts at the endof the 10o l* direction of-the axis of the shaft. l()

.enti o the. iillin .caseis compose the parts composing them have beenheld in position by. nuts 20. By means of the bolts 2,5 the end disk 19and end ringlSare drawn more closely together and the end -c'over as awhole -is held more firmly against *theend .plate l2 of the core.

y Byithu's tightly draW- osition the parts of the vend cover, are alsopressed more firmly in the By means of .the Wedge-'sha ed filling blocks24 a ing in the co` "shifting of the. coi s circumferentially isabsolute'l prevented. The bolts 25 hold the filling locks 24 firmly inposition and prevent their shifting circumferentially; Not

only do the filling blocksv support the coils but. they have anotherfunction equally as iiportant, namely .they support the por- `tions'ofthe bolts'-2fbetvveenl the end plate .12v and-end disk 19, so as tolprevent said bolts being sheared or bent outwardv by l'nFi s. 4 and `5l have shown modifications o niyinvention Which .shoW more clearl thefunction ofthe bolts. independblocks. of a number of solid steel disks26v mounted on the'shaft arid dravrn tightly together byaxial bolts 27and end nuts, one of Which is shown at 2'8 engaging the threadedportion29 of theshaft. The

yrotor here shown is'provid'ed With coils 15 and 'end cover- 17consisting of a ring 1S and enddisk ltlfsiinilar` to that firstdescribed.

1Extendingbetween the end disk 19 and the outer .26a of the core Withinthe projecting portions 'ofthe coils are a large number of vbol'tsSO..VThe portions of the boltsy be- Ati'rfeenthe disk 26a of the core andthedisk 19-of the end cover are unsupported and are made' accordinglystronger than those shown in Figs.' land-.3, being larger and preferablmade' of strong material such as nickel stee By means of these vbolts 30`the end cover I and its parts and the'coils are held firmly in ..45

position, as in the` construction first de! scribed.v v

Laim in my. claims to cover all modifica- ,tions which do not involve adeparture from the s irit 'and scope 'of my invention.

at l claim as new and desire to secure Y by Letters Patent is z-f -1..in a hi `h-speedrotor, a core having radialv slots, groups .ofconcentric coils located in the slots and"` having end portionsprojecting beyond the core ,Wedge shaped vinsulating bracing blockslocated intermediate the groups of coils and extending outward from thecore as substantial continuations of.'

Y the teeth thereof, and end shields or covers for. the end portions ofthe coils, each cover comprising a cylindrical ortion surrounding saidportions of the co' s and an inwardly extending end portion, saidbracing blocks engaging both the cylindrical portions and 'the inwardlyextending end portions of the The .core in this end covers so'that thelatter prevent "displacement of .said blocks' both radiallyfand 2. In ahigh speed rotor, -a core, groups of. concentric coils carried therebyand project# ing beyond the ends thereof, end covers for the projectingportions of the coils, filling blocks between the groups of coils, eachextending betu-'eentlie core and end-cover and axial bolts extendingbetween the end-cover and core through the illingblocks.

3. `in a'liigh-speed rotor of a dynamo-'elec- Atric machine,- va'core'having radial slots,

groups of concentric coils located in the slots and having end portionsprojectingbeyond the ends ofthe core, insulating spacing mem# j bersseparating the end portions of the coils of each group from one anotherand from the core, Wedgeshaped bracingblocks between the end ortions ofthe groups of coils, said bracing locks extending" outward from the coreas substantial continuations of the teeth thereof, end covers'for .theprojecting portions of the coils comprising a cylindrical portion and anend portion extending inward, and means for securing lthe end .coversand bracing blocks in position comprising v.bolts extending axiallythrough the end portions of the covers, through the bracing blocks,

and into the core..

4. ln a high speed rotor of a dynamo-electric machme, a core havingradial slots,

.inWar andineans for securing the end cover and the Wedge shaped bracingblocks in po' sition comprising axial bolts passing through theendportions of the end covers, through the bracing blocks, and into thecore.-

5. ln a rotor of a dynamo-electric inachine, va slotted cylindricalcore', groups of concen- 'groups of concentric coils located in theslots lio tric coils located in the slots of the core and projectingbeyond the ends thereof, Wedge.- shaped filling blocks between the endsof the grou s of coils, end-covers for the projecting portions. of thecoils each including a ring or and against which the vcoils and llingblocks bear, and an annular disk or platel mounted on the shaft andengaging the ring oi' band, and 'one or more bolts through the annulardist/k` or plate an passing blocks into the core. .f

iilling 6. in arotor of a dynamo-electric machine, 1

aslotted core, groups of-concentric .coils l located in. the slotsv and'projecting beyond ist ' timends of i:

Wg9-slmped bracing nilembers of now m miic mafteifa heated betwa'en theadjzmwnf groups 0f 00H2, and bearing gangt the ,com and the'Qutef'Cyndjca portions and 'jhe nwaldy extending 'portions of the endwww, and axial bots 3K bending 'a'zuoulqh the end covers and coibz'afing' membes the com, whereby the, bolts hold ille end.

covers and coil bracing membe'. in place' and the latter prevent h@Sham-mg ofthe l5 a bote.

v linessas:

